Fonseca, Sergio
Current rating: 1447
Record: 2-5-1
| Grand Prix Bilbao 2005 (extended) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 116 | Santos, Nuno (1568) | Lost 0-2 | -171483 |
| 2extended | 181 | Lopez, Enrique (1481) | Lost 1-2 | -181465 |
| 3extended | 196 | Jo Falcon, Ivan (1463) | Lost 1-2 | -181447 |
| 4extended | 221 | Larrea, Lander (1446) | Won 2-0 | +181465 |
| 5extended | 194 | Mendoza Euba, Ignacio (1466) | Won 2-1 | +181483 |
| 6extended | 157 | Salazar, Jose Antonio (1482) | Lost 1-2 | -181465 |
| 7extended | 157 | Rodrigues, Miguel (1464) | Draw 1-1 | 01465 |
| 8extended | 124 | Garai, Mikel Uriarte (1465) | Lost 1-2 | -181447 |
| average opponent: 1479record: 2-5-1 | new rating: 1447 | |||